caesura vs discontinuance

caesura

noun
  • A pause or interruption in a poem, music, building, or other work of art. 

  • Using two words to divide a metrical foot. 

  • The caesura mark ‖ or ||. 

  • A break of an era or other measure of history and time; where one era ends and another begins; turning point. 

discontinuance

noun
  • The occurrence of something being discontinued; a cessation; an incomplete ending. 

How often have the words caesura and discontinuance occurred in a corpus of books? (source: Google Ngram Viewer )